Communication method, apparatus, and system

Abstract

Embodiments of this application provide a communication method, apparatus, and system. The method may include: receiving first information from a second terminal device, where first sidelink control information includes a first priority value, and the first priority value indicates a priority of data corresponding to the first information; and sending first sharing indication information to the second terminal device, where the first sharing indication information indicates a first shared resource for the second terminal device, a second priority value is greater than or equal to the first priority value. In this way, a priority value corresponding to a shared resource indicated in sharing indication information is greater than or equal to a priority value corresponding to another terminal device. This helps ensure that the another terminal device normally uses a shared resource in an obtained COT shared resource, to improve transmission efficiency over an unlicensed spectrum.

What is claimed is: 
     
         1 . A communication method, wherein the method is applied to a second terminal device, and comprises:
 receiving second sharing indication information, wherein the second sharing indication information indicates a second shared resource obtained by the second terminal device, the second sharing indication information comprises a target channel access priority value, the target channel access priority value indicates a channel access priority corresponding to a second channel occupancy time resource, and the second channel occupancy time resource comprises the second shared resource; and   sending first data on the second shared resource based on the target channel access priority value.   
     
     
         2 . The method according to  claim 1 , wherein
 a channel access priority value corresponding to the first data is less than or equal to the target channel access priority value.   
     
     
         3 . The method according to  claim 2 , wherein the sending first data on the second shared resource based on the target channel access priority value comprises:
 when the second shared resource is used for initial transmission, assembling data based on the target channel access priority value, to obtain the first data; and   sending the first data on the second shared resource.   
     
     
         4 . The method according to  claim 2 , wherein the sending first data on the second shared resource based on the target channel access priority value comprises:
 when the second shared resource is used for retransmission, if a channel access priority value corresponding to initially transmitted data is less than or equal to the target channel access priority value, sending the first data on the second shared resource, wherein the first data is the initially transmitted data.   
     
     
         5 . The method according to  claim 2 , wherein the sending first data on the second shared resource based on the target channel access priority value comprises:
 when the second shared resource is used for retransmission, if a channel access priority value corresponding to initially transmitted data is greater than the target channel access priority value, assembling data based on the target channel access priority value, to obtain the first data; and   sending the first data on the second shared resource.   
     
     
         6 . The method according to  claim 1 , wherein the second sharing indication information further includes a location of the second shared resource and/or a type of LBT at the location of the second shared resource. 
     
     
         7 . The method according to  claim 1 , wherein the type of LBT at the location of the second shared resource is a type 2A LBT, type 2B LBT, or type 2C LBT. 
     
     
         8 . The method according to  claim 1 , the second shared resource is at least one reserved resource block that meets a sharing condition of a COT resource in the third reserved resource. 
     
     
         9 . A communication method, wherein the method is applied to a first terminal device, and comprises:
 determining second sharing indication information;   sending the second sharing indication information to a second terminal device, wherein the second sharing indication information indicates a second shared resource obtained by the second terminal device, the second sharing indication information comprises a target channel access priority value, the target channel access priority value indicates a channel access priority corresponding to a second channel occupancy time resource, and the second channel occupancy time resource comprises the second shared resource.   
     
     
         10 . The method according to  claim 9 , wherein
 a channel access priority value corresponding to the first data is less than or equal to the target channel access priority value.   
     
     
         11 . The method according to  claim 9 , wherein the second sharing indication information further includes a location of the second shared resource and/or a type of LBT at the location of the second shared resource. 
     
     
         12 . The method according to  claim 9 , wherein the type of LBT at the location of the second shared resource is a type 2A LBT, type 2B LBT, or type 2C LBT. 
     
     
         13 . An apparatus, comprising:
 at least one processor; and   a memory storing programming, the programming including instructions that, when executed by the at least one processor, cause the apparatus to perform:   receiving second sharing indication information, wherein the second sharing indication information indicates a second shared resource obtained by the apparatus, the second sharing indication information comprises a target channel access priority value, the target channel access priority value indicates a channel access priority corresponding to a second channel occupancy time resource, and the second channel occupancy time resource comprises the second shared resource; and   sending first data on the second shared resource based on the target channel access priority value.   
     
     
         14 . The apparatus according to  claim 13 , wherein
 a channel access priority value corresponding to the first data is less than or equal to the target channel access priority value.   
     
     
         15 . The apparatus according to  claim 14 , wherein the sending first data on the second shared resource based on the target channel access priority value comprises:
 when the second shared resource is used for initial transmission, assembling data based on the target channel access priority value, to obtain the first data; and   sending the first data on the second shared resource.   
     
     
         16 . The apparatus according to  claim 14 , wherein the sending first data on the second shared resource based on the target channel access priority value comprises:
 when the second shared resource is used for retransmission, if a channel access priority value corresponding to initially transmitted data is less than or equal to the target channel access priority value, sending the first data on the second shared resource, wherein the first data is the initially transmitted data.   
     
     
         17 . The apparatus according to  claim 14 , wherein the sending first data on the second shared resource based on the target channel access priority value comprises:
 when the second shared resource is used for retransmission, if a channel access priority value corresponding to initially transmitted data is greater than the target channel access priority value, assembling data based on the target channel access priority value, to obtain the first data; and   sending the first data on the second shared resource.   
     
     
         18 . The apparatus according to  claim 15 , wherein the second sharing indication information further includes a location of the second shared resource and/or a type of LBT at the location of the second shared resource. 
     
     
         19 . The apparatus according to  claim 15 , wherein the type of LBT at the location of the second shared resource is a type 2A LBT, type 2B LBT, or type 2C LBT. 
     
     
         20 . The apparatus according to  claim 15 , the second shared resource is at least one reserved resource block that meets a sharing condition of a COT resource in the third reserved resource.